BOSTON -- Two girls killed in a South Boston fire were laid to rest Saturday.

Services were held for 14-year-old Acia Johnson and her 2-year-old sister, Sophia, at Saint Vincent's Church.

The two were found trapped under debris in a rear upper room of their row house on 154 W. Sixth St.

The Boston Fire Investigation Unit said the fire was intentionally set.

Their deaths were labeled homicides by smoke inhalation and thermal injuries.

Boston police continue to actively investigate the facts and circumstances surrounding the fire. Anyone who has information is urged to contact the Homicide Unit at 617- 343-4470 or the Crime Stoppers Tip Line at 800-494-TIPS.